Cause : GRND Init comes when the ground fault test, a current not equal to zero has been measured, or an UCE or overcurrent monitoring has responded, although no value has yet been triggered.

1. The fault cause can be read-out of r358 "ground fault test result".
2. Check the converter output for short-circuit or ground fault (-X2:U2, V2, W2 - including motor).
3. Check that the CU board is correctly inserted. Frame sizes 1 and 2:
4. Check the transistor modules on the PEU board -A23 for short-circuit. Frame sizes 3 and 4:
5. Check the transistor modules -A100, -A200, -A300 for a short-circuit condition.